part of part of has muscle origin has muscle origin has muscle insertion has muscle insertion has muscle antagonist ulna abductor pollicis longus http://upload.wikimedia.org/wikipedia/commons/6/66/Gray1231.png The Abductor pollicis longus lies immediately below the Supinator and is sometimes united with it. [WP,unvetted]. musculus abductor pollicis longus EMAPA:36210 abductor pollicis longus muscle SCTID:256671001 MA:0002266 UBERON:0001527 UMLS:C0224278 FMA:38515 Wikipedia:Abductor_pollicis_longus_muscle NCIT:C52888 forelimb adductor pollicis muscle metacarpal bone of digit 1 abductor pollicis muscle